OLED Display Controller Frequency Adaptation
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Solution Overview
Problem
Conventional OLED displays require increased input frequency in stereoscopic mode to match doubled output frequency, leading to higher power consumption and complex frequency amplification circuits, which complicates the display's design and increases heat generation.
Innovation Solution
The OLED display employs a controller that converts image signals into 2N-bit data for 2D mode and N-bit data for stereoscopic mode, allowing for a constant input frequency, thereby doubling the output frequency without needing frequency amplification circuits, and simplifies memory controller operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the input frequency is increased in stereoscopic mode to match doubled output frequency, then the output frequency requirement is met, but power consumption increases and heat generation increases
Solution Approach 1:
The patent dynamically adjusts the output frequency based on display mode: in 2D mode, the output frequency matches the input frequency, while in stereoscopic mode, the output frequency is doubled. This dynamic adaptation allows the system to meet different frequency requirements without continuously operating at high frequency, thereby reducing power consumption and heat generation when stereoscopic mode is not active.
2Speed
If frequency amplification circuits are added to double the output frequency in stereoscopic mode, then the output frequency requirement is met, but device complexity increases
Solution Approach 1:
The patent extracts and removes the frequency amplification circuit from the display system. Instead of using traditional frequency doubling circuits, the invention processes image data at the original input frequency and directly drives the display panel, eliminating the need for complex frequency multiplication hardware while still achieving the required output frequency in stereoscopic mode.
3Speed
If frequency amplification circuits are added to double the output frequency in stereoscopic mode, then the output frequency requirement is met, but heat generation increases
Solution Approach 1:
The patent converts the potential harm of high-frequency operation (heat generation) into a benefit by processing image data at the lower input frequency and using efficient data formatting techniques. This approach achieves the required high output frequency for stereoscopic display without the heat-generating side effects of traditional frequency amplification circuits.
4Productivity
If the input frequency is increased to maintain constant frame rate in stereoscopic mode, then the display performance is maintained, but power consumption increases
Solution Approach 1:
The patent changes the data processing parameters rather than the operating frequency. By modifying how image data is formatted and divided into sub-frames, the system maintains display performance in stereoscopic mode while keeping the input frequency constant, thereby avoiding the increased power consumption that would result from raising the input frequency.
Data Source
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AI summary
An organic light-emitting diode (OLED) display and method of driving the same are disclosed. In one aspect, the OLED display includes a display panel including a plurality of pixels and a data driver configured to apply a data signal to the display panel in one of two-dimensional (2D) and stereoscopic display modes. The display also includes a controller configured to convert an image signal to 2D image data for the pixels at each of N x k sub-fields in the 2D display mode and convert the image signal to stereoscopic image data for the pixels at each of N sub-fields in the stereoscopic display mode, where N and k are integers greater than 1. The display further includes a frame memory configured to store the 2D image data in the 2D display mode and the stereoscopic image data in the stereoscopic display mode.